<table style="width: 100%;">
    <tr>
        <td colspan="2" style="text-align: right" id="usuario_info"></td>
    </tr>
    <tr>
        <td style="width: 250px; vertical-align: top">
            <div id="menu">
            </div>
        </td>
        <td style="vertical-align: top">
            <div id="principal_content" class="ui-widget ui-widget-content ui-corner-all">
                <div class="ui-dialog-titlebar ui-widget-header ui-corner-all ui-helper-clearfix" style="height: 20px; vertical-align: middle; text-align: center">
                    <span class="ui-dialog-title" id="principal_content_title"></span>
                </div>
                <img id="progress" alt="Aguarde..." src="../resources/images/spinner.gif">
            </div>
            <div id="rodape">
            </div>
        </td>
    </tr>
</table>